CN109909686A - A kind of longitudinal seam welding of barrel method - Google Patents
A kind of longitudinal seam welding of barrel method Download PDFInfo
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- CN109909686A CN109909686A CN201910090575.XA CN201910090575A CN109909686A CN 109909686 A CN109909686 A CN 109909686A CN 201910090575 A CN201910090575 A CN 201910090575A CN 109909686 A CN109909686 A CN 109909686A
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Abstract
In order to solve the problems, such as existing slab longitudinal seam welding of barrel low efficiency, the present invention provides a kind of longitudinal seam welding of barrel methods, comprising the following steps: S1: plate cutting；S2: plate rolls into cylinder；S3: clamping is carried out to cylinder and is fixed；S4: first time welding is carried out to weld seam, welding current is greater than or equal to 330A；S5: second is carried out to weld seam and is welded；S6: cleaning.Bevelled process is eliminated in the application, by improving the welding current of welding for the first time, is greatly improved the pressure and penetrability of welding arc, so that electric arc is hit plate and obtain " keyhole effect ", generate two sides and form excellent weld seam, saved weld interval；Solves the problems, such as existing slab longitudinal seam welding of barrel low efficiency, simultaneously as square groove, reduces the welding material in groove region, reduce welding cost.
Description
Technical field
The present invention relates to the longitudinal seam welding of barrel technical field of pressure vessel more particularly to a kind of longitudinal seam welding of barrel sides
Method.
Background technique
Currently, the cylinder of many pressure vessels is formed using heavy wall coiled sheet system, plate thickness is greater than or equal to 6mm；So
The splicing seams rolled are welded afterwards, splicing seams are parallel with tubular axis, also referred to as longitudinal joint；Welding for longitudinal joint,
Have at present public using unilateral bevel or bilateral bevelled mode, such as Chinese patent literature CN201410446297.4 institute
A kind of thick-wall cylinder longitudinal joint narrow gap welding retaining wall on slope technique opened, uses the bevelled structure in both sides；This mode because
To increase bevel process, weld interval, low efficiency are increased, while increasing welding material.
For in above-mentioned slab heavy caliber longitudinal seam welding, there are also a kind of welding procedures are as follows: first passes through welding gun to cylinder inseam
It is welded；Then back chipping processing is carried out to weld seam using carbon arc air gouging, also similar to bevel process, provides weldering for later period welding
Connect basis；Then it polishes the weld seam after gouge, in order to weld even tissue, compactness is good；Finally to weld seam into
Row filling welds and carries out cover welding to weld seam.This welding method equally exists the processes such as back chipping, filling weldering, welding effect
Rate is low, and because of multiple welding, welding quality is difficult to control, and passes through carrying out flaw detection solder yield about 90%.
Summary of the invention
In order to solve the problems, such as existing slab longitudinal seam welding of barrel low efficiency, the present invention provides a kind of longitudinal seam welding of barrel
Method reduces welding material its object is to improve welding efficiency, improves welding quality.
The present invention is implemented as follows: a kind of longitudinal seam welding of barrel method,
S1: plate cutting clears up the surrounding of plate；
S2: plate rolls into cylinder, polishes weld seam two sides；
S3: clamping is carried out to cylinder and is fixed；
S4: carrying out first time welding to weld seam, welding for the first time include with the direct butt welding seam welding of welding gun, welding current be greater than or
Equal to 330A；
S5: weld seam weld for the second time, second of welding is welded on the basis of being included in welding for the first time by welding wire；
S6: cleaning.
For the present invention in specifically used, board dimension carries out blanking as needed, can plasma numerically-controlled machine tool or logical
It crosses other equipment blankings, the surrounding of plate is cleared up after the completion of blanking, mainly clear up burr, greasy dirt, impurity etc., allow plate
Surrounding it is clean and tidy；Plate is rolled secondly by veneer reeling machine, allow plate formed tube structure, after rolling to weld seam two sides into
Row polishing, can be polished by angle grinder, until exposing metallic luster until being polishing to plate, in order to improve the cause of seam organization
The bonding strength of close property and weld seam and parent；Then clamping is carried out to cylinder to fix, carry out clamping using tooling, that is, allow
Weld seam is fixed in position in the welding process, improves welding quality；Then first time welding is carried out to weld seam, i.e. progress bottoming
Welding, for the first time welding include that can not have to welding wire with the direct butt welding seam welding of welding gun, carry out bevel, root without to plate
Welding current may be selected more than or equal to 330A according to plate thickness；It is welded in this application by high current, allows mother using electric arc
Material self-dissolving allows weld seam to reach two sides molding；After the completion of first time welds, in order to improve the aesthetics of weld seam face type, mention simultaneously
High welding quality then carries out second to weld seam and welds, i.e. cover welding, and second of welding includes the base in first time welding
It is welded on plinth by welding wire, welding wire well-known to those skilled in the art may be selected in welding wire, especially selection model CHG-
The welding wire welding effect of 56R, diameter 1.2mm are best, and appearance of weld is beautiful, and in cover welding, welding current be may be selected
150A to 520A；Finally weld seam is cleared up, then carries out carrying out flaw detection.
Bevelled process is eliminated in the application, by improving the welding current of welding for the first time, is greatly improved
The pressure and penetrability of welding arc make electric arc hit plate and obtain " keyhole effect ", generates two sides and form excellent weld seam, save
About weld interval；For compared with the prior art, back chipping technique is eliminated, has also achieved the effect that save weld interval, relatively
Traditional welding improves efficiency 3-5 times；Solves the problems, such as existing slab longitudinal seam welding of barrel low efficiency, simultaneously as not opening slope
Mouthful, reduce the welding material in groove region, reduces welding cost.
Specific embodiment
In order to which the objects, technical solutions and advantages of the application are more clearly understood, with reference to embodiments, to the present invention
It is further elaborated, longitudinal joint is that plate rolls rear gap to be welded in this application, is equal with weld seam.
The present invention is in specifically used, a kind of longitudinal seam welding of barrel method, S1: plate cutting, carries out to the surrounding of plate
Cleaning；S2: plate rolls into cylinder, polishes weld seam two sides；S3: clamping is carried out to cylinder and is fixed；S4: weld seam is carried out
It welds for the first time, welding for the first time includes with the direct butt welding seam welding of welding gun, and welding current is greater than or equal to 330A；S5: butt welding
Seam weld for the second time, and second of welding is welded on the basis of being included in welding for the first time by welding wire；S6: cleaning.
It in the application first embodiment, selects material for the plate of Q345R, rolls rear cylinder body diameter 800mm, plate thickness
6mm, longitudinal joint length 1500mm；The longitudinal joint of cylinder is welded according to above-mentioned steps, is welded in four steps welding for the first time
Connecing electric current is 330A, speed of welding 340mm/min, the 5th step second weld in welding current be 150A, speed of welding
160mm/min carries out carrying out flaw detection, qualification rate 99.52% to weld seam after the completion of welding.
It in the application second embodiment, selects material for the plate of SA516-GR70, rolls rear cylinder body diameter 1500mm,
Plate thickness 8mm, longitudinal joint length 2000mm；The longitudinal joint of cylinder is welded according to above-mentioned steps, four steps is welded for the first time
Middle welding current is 380A, speed of welding 340mm/min, the 5th step second weld in welding current be 230A, welding speed
150mm/min is spent, carrying out flaw detection, qualification rate 99.37% are carried out to weld seam after the completion of welding.
It in the application 3rd embodiment, selects material for the plate of Q345R, rolls rear cylinder body diameter 2000mm, plate thickness
8mm, longitudinal joint length 2000mm；The longitudinal joint of cylinder is welded according to above-mentioned steps, is welded in four steps welding for the first time
Connecing electric current is 380A, speed of welding 340mm/min, the 5th step second weld in welding current be 430A, speed of welding
150mm/min carries out carrying out flaw detection, qualification rate 99.45% to weld seam after the completion of welding.
It in the application fourth embodiment, selects material for the plate of Q370R, rolls rear cylinder body diameter 3000mm, plate thickness
10mm, longitudinal joint length 2500mm；The longitudinal joint of cylinder is welded according to above-mentioned steps, is welded in four steps welding for the first time
Connecing electric current is 440A, speed of welding 260mm/min, the 5th step second weld in welding current be 470A, speed of welding
130mm/min carries out carrying out flaw detection, qualification rate 99.39% to weld seam after the completion of welding.
It in the 5th embodiment of the application, selects material for the plate of Q345R, rolls rear cylinder body diameter 4000mm, plate thickness
12mm, longitudinal joint length 3000mm；The longitudinal joint of cylinder is welded according to above-mentioned steps, is welded in four steps welding for the first time
Connecing electric current is 470A, speed of welding 240mm/min, the 5th step second weld in welding current be 520A, speed of welding
100mm/min carries out carrying out flaw detection, qualification rate 99.43% to weld seam after the completion of welding.
In other embodiments, according to plate thickness, welding current may be selected more greatly, to weld for the second time in welding for the first time
Electric current also may be selected bigger.
By above-mentioned each embodiment it is found that eliminating bevelled process in the application, welded for the first time by improving
Welding current, greatly improve the pressure and penetrability of welding arc, make electric arc hit plate obtain " keyhole effect ", produce
Raw two sides forms excellent weld seam, has saved weld interval；For compared with the prior art, back chipping technique is eliminated, is also reached
The effect of weld interval is saved, opposite traditional welding improves efficiency 3-5 times；Solves existing slab longitudinal seam welding of barrel low efficiency
The problem of, simultaneously as square groove, reduces the welding material in groove region, reduces welding cost.
It further, further include carrying out spot welding to weld seam to fix in order to improve fixation weld, in the application S3 step, i.e.,
After rolling into cylinder to plate, the longitudinal joint of cylinder is fixed, it is uniform convenient for welding when welding, it can be carried out by argon arc welding
Spot welding is carried out to longitudinal joint to fix, in the prior art, in order to improve the intensity of welding point, crator, that is, weld of spot welding it is more big more
It is good；But in this application, if spot welding is too deep, the commissure global tissue uniformity is low, if spot welding is excessively shallow, is easy to cause weld seam
Deviate, weld seam is not fixed firmly, and the weld height of the present invention its single spot welding in specific application is not above base material 1mm, phase
The distance between adjoint point weldering is 50-80mm, the fusion length 10-15mm of single spot welding；Such soldering reliability is high, group after welding
It knits uniformly, qualification rate is high.
In order to further increase welding quality, gap≤1mm of step 3 kind weld seam two sides in this application, the mistake of weld seam
Side amount≤1mm；If the excessive weld seam for being easy to cause spot welding of unfitness of butt joint of the excessive perhaps longitudinal joint of weld gap is too long or spot welding
Crator is excessively high, and then leads to nonuniform organization, reduces weldquality, if weld gap is too small or the unfitness of butt joint of longitudinal joint is too small,
It then improves and rolls difficulty, need the curly form by repeatedly adjusting plate, improve curling time and curling cost；This hair
Bright that the gap control of weld seam two sides before spot welding is being less than or equal to 1mm in specific application, the unfitness of butt joint control of weld seam is small
In or equal to 1mm, welding quality is high at this time, and ensure that Curl Efficiency, and curling cost is controllable.
In order to further increase welding quality, roll convenient for plate in cylinder, convenient for longitudinal joint after control curling gap and
Unfitness of butt joint, catercorner length error≤3mm of plate, the both ends of the surface for constituting longitudinal joint are parallel after clearing up in the application S1 step
Degree≤1mm.
In order to further increase welding quality, polish in the application S2 step weld seam two sides comprising adjust the distance
Range in weld seam 20mm is polished, if polishing region is excessive, improves welding cost, and extend weld interval, if
Polishing region is too small, then is difficult to ensure that weldquality, the application emphasis are directed to thick plates, weldering of adjusting the distance in specifically used
Range in seam 20mm is polished, reliable welding quality.
When weld for the first time to weld seam in this application, welding wire can be not added, saved welding material；It is relatively existing
Welding procedure does not have to carry out back chipping to weld seam, has saved back chipping cost and has saved the time；It is filled out simultaneously without to weld seam
It fills weldering, directly carries out welding for second after welding for the first time, save weld interval, welding efficiency promotes 3-5 times, and
Welding quality is good, and weld seam face type is beautiful, and flaw detection qualification rate reaches 99% or more.
Although the detailed description and description of the specific embodiments of the present invention are given above, it should be noted that
We can carry out various equivalent changes and modification to above embodiment according to the concept of the present invention, and generated function is made
It, should all be within protection scope of the present invention when with the spirit still covered without departing from specification.
Claims (8)
1. a kind of longitudinal seam welding of barrel method, which is characterized in that
S1: plate cutting clears up the surrounding of plate；
S2: plate rolls, and polishes weld seam two sides;
S3: clamping fixation weld；
S4: carrying out first time welding to weld seam, welding for the first time include with the direct butt welding seam welding of welding gun, welding current be greater than or
Equal to 330A；
S5: weld seam weld for the second time, second of welding is welded on the basis of being included in welding for the first time by welding wire；
S6: cleaning.
2. longitudinal seam welding of barrel method according to claim 1, which is characterized in that further include in S3 step to weld seam into
Row spot welding is fixed.
3. longitudinal seam welding of barrel method according to claim 2, which is characterized in that the spot welding height is not above base material
1mm, spot welding distance 50-80mm, spot welding length 10-15mm.
4. longitudinal seam welding of barrel method according to claim 1 or 2 or 3, which is characterized in that clear up back plate in S1 step
Catercorner length error≤3mm of material constitutes the both ends of the surface depth of parallelism≤1mm of longitudinal joint.
5. longitudinal seam welding of barrel method according to claim 1 or 2 or 3, which is characterized in that weld seam described in S2 step
Two sides polishing comprising the range adjusted the distance in weld seam 20mm is polished.
6. longitudinal seam welding of barrel method according to claim 4, which is characterized in that weld seam two sides described in S2 step are beaten
Mill comprising the range adjusted the distance in weld seam 20mm is polished.
7. longitudinal seam welding of barrel method described according to claim 1 or 2 or 3 or 6, which is characterized in that weld seam in S3 step
Gap≤1mm of two sides, unfitness of butt joint≤1mm of weld seam.
8. longitudinal seam welding of barrel method according to claim 5, which is characterized in that the gap of weld seam two sides in S3 step
≤ 1mm, unfitness of butt joint≤1mm of weld seam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910090575.XA CN109909686A (en) | 2019-01-30 | 2019-01-30 | A kind of longitudinal seam welding of barrel method |
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| CN201910090575.XA CN109909686A (en) | 2019-01-30 | 2019-01-30 | A kind of longitudinal seam welding of barrel method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805174A (en) * | 2020-06-19 | 2020-10-23 | 中建四局安装工程有限公司 | Manufacturing and assembling method of large closed cold accumulation tank |
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| US4252244A (en) * | 1979-05-18 | 1981-02-24 | Nooter Corporation | Layered pressure vessel head with machined surfaces |
| CN104128694A (en) * | 2014-07-24 | 2014-11-05 | 江门市新会区同达化工机械制造有限公司 | Longitudinal seam red copper liner welding process of steel sheet pressure vessel and red copper liner used by same |
| CN104493440A (en) * | 2014-11-28 | 2015-04-08 | 安徽盛运环保（集团）股份有限公司 | Manufacturing process of bellows expansion joint |
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| CN109014497A (en) * | 2018-07-20 | 2018-12-18 | 沈阳鼓风机集团压力容器有限公司 | It is a kind of suitable for compressor and its with the pipeline welding method for applying lubricating oil station |
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2019
- 2019-01-30 CN CN201910090575.XA patent/CN109909686A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4252244A (en) * | 1979-05-18 | 1981-02-24 | Nooter Corporation | Layered pressure vessel head with machined surfaces |
| CN104128694A (en) * | 2014-07-24 | 2014-11-05 | 江门市新会区同达化工机械制造有限公司 | Longitudinal seam red copper liner welding process of steel sheet pressure vessel and red copper liner used by same |
| CN104493440A (en) * | 2014-11-28 | 2015-04-08 | 安徽盛运环保（集团）股份有限公司 | Manufacturing process of bellows expansion joint |
| CN204584516U (en) * | 2015-01-10 | 2015-08-26 | 青岛科技大学 | A kind of straight weld automatic welding one side welding with back formation device |
| CN207942087U (en) * | 2018-01-25 | 2018-10-09 | 珠海格力电器股份有限公司 | Composition backing device |
| CN207888035U (en) * | 2018-03-08 | 2018-09-21 | 上海多木实业有限公司 | A kind of high-power high fusion penetration TIG welding guns |
| CN109014497A (en) * | 2018-07-20 | 2018-12-18 | 沈阳鼓风机集团压力容器有限公司 | It is a kind of suitable for compressor and its with the pipeline welding method for applying lubricating oil station |
Non-Patent Citations (1)
| Title |
|---|
| 尹显奇: "《轻钢结构施工与监理手册》", 31 December 2003 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805174A (en) * | 2020-06-19 | 2020-10-23 | 中建四局安装工程有限公司 | Manufacturing and assembling method of large closed cold accumulation tank |
| CN111805174B (en) * | 2020-06-19 | 2022-03-08 | 中建四局安装工程有限公司 | Manufacturing and assembling method of large closed cold accumulation tank |
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Application publication date: 20190621 |